CN113880547A - Sprayed concrete for foundation pit slope and construction method thereof - Google Patents
Sprayed concrete for foundation pit slope and construction method thereof Download PDFInfo
- Publication number
- CN113880547A CN113880547A CN202111183703.9A CN202111183703A CN113880547A CN 113880547 A CN113880547 A CN 113880547A CN 202111183703 A CN202111183703 A CN 202111183703A CN 113880547 A CN113880547 A CN 113880547A
- Authority
- CN
- China
- Prior art keywords
- parts
- slag powder
- concrete
- bottom slag
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011378 shotcrete Substances 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 title claims abstract description 56
- 239000002893 slag Substances 0.000 claims abstract description 72
- 239000000843 powder Substances 0.000 claims abstract description 69
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 45
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 42
- 239000004567 concrete Substances 0.000 claims abstract description 34
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000004568 cement Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 11
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 9
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims abstract description 8
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 8
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims abstract description 8
- 239000008108 microcrystalline cellulose Substances 0.000 claims abstract description 8
- 229940016286 microcrystalline cellulose Drugs 0.000 claims abstract description 8
- 238000000967 suction filtration Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 11
- 239000004677 Nylon Substances 0.000 claims description 6
- 230000003020 moisturizing effect Effects 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 5
- 229930006000 Sucrose Natural products 0.000 claims description 5
- 239000005720 sucrose Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 235000008206 alpha-amino acids Nutrition 0.000 claims description 2
- 150000001370 alpha-amino acid derivatives Chemical class 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 68
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910000863 Ferronickel Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 150000007649 L alpha amino acids Chemical class 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- IQYKECCCHDLEPX-UHFFFAOYSA-N chloro hypochlorite;magnesium Chemical compound [Mg].ClOCl IQYKECCCHDLEPX-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 150000001371 alpha-amino acids Chemical class 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical compound [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/04—Alkali metal or ammonium silicate cements ; Alkyl silicate cements; Silica sol cements; Soluble silicate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
- C04B24/383—Cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
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- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0045—Composites
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Botany (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a construction method of shotcrete for a foundation pit side slope, wherein the shotcrete mainly comprises three parts, namely a grouting layer, a covering layer and a concrete layer, and the grouting layer comprises the following components: 20-50 parts of water glass solution, 30-50 parts of garbage bottom slag powder, 1-10 parts of MgO, 10-20 parts of magnesium chloride and 50-100 parts of water; before the garbage bottom slag powder is used, the garbage bottom slag powder needs to be immersed into 0.05-0.2 mol/L hydrochloric acid solution for 1-3 hours, the mass ratio of the garbage bottom slag powder to the solution is 1: 10-1: 20, then water glass solution is dropwise added into the bottom slag powder solution while stirring, the stirring speed is 10-30 r/min, the mass ratio of the water glass solution to the garbage bottom slag powder is 1: 30-1: 80, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying; the cover layer includes: cotton-flax fiber and water glass solution; the concrete layer includes: 300-500 parts of cement clinker, 100-200 parts of lithium slag powder, 300-500 parts of ceramsite, 5-20 parts of ferric chloride, 10-20 parts of microcrystalline cellulose and 150 parts of water. The invention solves the problems of easy collapse and high rebound rate of common sprayed concrete.
Description
Technical Field
The invention belongs to the technical field of sprayed concrete, and particularly relates to a construction method of sprayed concrete for a foundation pit slope.
Background
The sprayed concrete is a construction material for spraying concrete, mortar and other materials to a construction plane by using related concrete spraying machinery, and is quickly popularized and applied due to quick construction. However, the rebound rate of the sprayed concrete is higher at present, namely, the concrete material falls off a lot after being sprayed to the construction plane, in addition, the construction plane is not firm, and the dead weight of the construction plane is increased after the concrete is sprayed, so that the collapse of the construction plane is caused, and a greater safety risk is brought to the construction of the sprayed concrete.
Patent 202010916438X discloses a shotcrete and a construction method thereof, the shotcrete is composed of a cementitious material layer and an interface treatment layer, wherein the cementitious material layer is formed by mixing the following components in parts by weight: 200-600 parts of carbon chromium slag, 100-200 parts of magnesium oxide, 100-200 parts of sodium hydrogen phosphate, 50-100 parts of lithium slag powder, 50-100 parts of steel slag powder, 10-50 parts of aluminum powder, 30-60 parts of water glass, 50-180 parts of ASA resin emulsion, 10-50 parts of a coagulation regulator, 400-800 parts of recycled aggregate and 100-200 parts of water; the interface treatment layer is formed by mixing the following components in parts by weight: 30-60 parts of acrylic emulsion, 20-40 parts of waterborne polyurethane, 10-30 parts of silane coupling agent, 5-20 parts of sodium metasilicate, 10-30 parts of limestone powder and 100-200 parts of water.
Patent 201811538706.8 discloses an ultra-high toughness alkali-activated shotcrete and a preparation method thereof, and discloses an ultra-high toughness alkali-activated shotcrete and a preparation method thereof, wherein the shotcrete comprises the following components in parts by mass: 200-400 parts of superfine lithium slag powder; 100-200 parts of slag powder; 50-100 parts of stone powder waste; 30-60 parts of Portland cement; 10-70 parts of a sodium hydroxide solution; 15-50 parts of a sodium silicate solution; 1-10 parts of aluminum sulfate; 1-5 parts of nano aluminum oxide; 400-900 parts of nickel slag sand; 300-600 parts of copper slag sand; 3-6 parts of a thickening agent; 1-20 parts of fiber; 3-10 parts of a water reducing agent; 200-350 parts of water. The invention effectively solves the problems of large cement consumption and poor durability of the existing common ultrahigh-performance shotcrete.
Patent 202010916411.0 discloses alkali-activated blast furnace ferronickel slag sprayed concrete, which is composed of, by mass, 300 parts of blast furnace ferronickel slag powder, 200 parts of zeolite powder, 50-100 parts of carbide slag, 30-90 parts of sodium hydroxide, 20-60 parts of sodium silicate, 30-50 parts of a coagulation regulator, 10-20 parts of ASA resin emulsion, 600 parts of machine-made sand, 100 parts of water slag, 3-6 parts of a thickener, 1-20 parts of steel fibers and 170 parts of water. The sprayed concrete of the invention has the advantages of less cement consumption, high toughness, good durability, and use of a large amount of industrial wastes, thus being beneficial to environmental protection.
The above patent starts from the performance of the shotcrete, and solves some problems of the shotcrete, but the performance of the shotcrete depends on the performance of the shotcrete on one hand, and the test depends on the construction technology of the shotcrete on the other hand. The invention provides a sprayed concrete construction method for a foundation pit side slope, which solves the problems that the rebound rate is high and a construction plane is easy to collapse in the sprayed concrete construction process.
Disclosure of Invention
The invention aims to solve the problems that the common sprayed concrete in the prior art is high in rebound rate and easy to collapse on a construction plane.
Technical scheme
The sprayed concrete for the foundation pit side slope and the construction method thereof are characterized in that the sprayed concrete mainly comprises a grouting layer, a covering layer and a concrete layer, wherein the grouting layer comprises: 20-50 parts of water glass solution, 30-50 parts of garbage bottom slag powder, 1-10 parts of MgO, 10-20 parts of magnesium chloride and 50-100 parts of water; before the garbage bottom slag powder is used, the garbage bottom slag powder needs to be immersed into 0.05-0.2 mol/L hydrochloric acid solution for 1-3 hours, the mass ratio of the garbage bottom slag powder to the solution is 1: 10-1: 20, then water glass solution is dropwise added into the garbage bottom slag powder solution while stirring, the stirring speed is 10-30 r/min, the mass ratio of the water glass solution to the garbage bottom slag powder is 1: 30-1: 80, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying; the cover layer includes: cotton-flax fiber and water glass solution; the concrete layer includes: 300-500 parts of cement clinker, 100-200 parts of lithium slag powder, 300-500 parts of ceramsite, 5-20 parts of ferric chloride, 10-20 parts of microcrystalline cellulose and 150 parts of water;
the construction method mainly comprises the following steps:
1) inserting barbed hollow nylon plastic expansion pipes into the construction plane every 10-30 cm, wherein the length of each expansion pipe is 20-30 cm;
2) injecting a grouting layer material into the expansion pipe, and standing for 1-3 hours;
3) inserting a screw into the expansion pipe, wherein the distance of the screw exposed out of the construction plane is 2-5 cm, and the screw is made of carbon fiber, glass fiber and the like;
4) suspending a covering layer on the screw, wherein the cotton-flax fiber in the covering layer needs to be soaked or sprayed with a water glass solution;
5) spraying sprayed concrete on the fabric layer by layer from bottom to top and along the construction plane, extruding the concrete onto the fabric layer by using a nozzle of a concrete spraying device, and spraying the sprayed concrete to the same thickness as the height of the screw leaking out of the construction plane in the step 3);
6) and (5) spraying, moisturizing and curing for 3-7 days.
The modulus of the water glass is between 1.5 and 2.5.
The ceramsite is shale ceramsite, the particle size of the ceramsite is less than 3mm, the ceramsite needs to be soaked in one or more of 0.01-0.05 mol/L alpha-amino acid, sucrose and magnesium chloride solution for more than 24 hours before use, and then the ceramsite is dried until no obvious water stain exists on the surface of the ceramsite.
The invention has the beneficial effects that:
1) the invention enhances the integrity of the sprayed concrete by 'bones' of the sprayed concrete cloth through the expansion pipe, the cotton and hemp fiber and the like, but the invention does not utilize any iron reinforcing steel bar, and the problem of corrosion of the reinforcing steel bar can not occur;
2) the water glass can react with aluminum-silicon materials in soil in the foundation pit slope to play a role in consolidating the soil, in addition, garbage bottom slag powder, MgO, magnesium chloride solution and the like can generate chemical reaction of magnesium oxychloride cement materials to accelerate the consolidation of the soil, the garbage bottom slag powder can adjust the hydration speed of the magnesium oxychloride cement on one hand, and on the other hand, the early treatment process of the garbage bottom slag powder greatly improves the activity of the garbage bottom slag powder, and meanwhile, the modified garbage bottom slag powder can react with the water glass solution to play a role in consolidating the construction plane;
3) the concrete layer of the invention adopts cement clinker instead of cement, thus greatly shortening the setting time of sprayed concrete, avoiding using an accelerator, and the lithium slag powder contains gypsum, which can adjust the hydration speed of the cement clinker on one hand, and in addition, the lithium slag powder is a porous structure, and can accelerate the forming and hardening of the sprayed concrete after the sprayed concrete construction; in addition, the water glass is arranged on the surface layer of the covering layer, so that the hardening of the sprayed concrete can be accelerated when the sprayed concrete covers the water glass; the use of the ceramsite reduces the dead weight of the sprayed concrete and reduces the collapse probability of a construction plane, in addition, the pretreatment process of the ceramsite before use can change the environment around the ceramsite particles, so that calcium hydroxide, ettringite and the like which are cement hydration products are difficult to stack and form on the surface of the ceramsite, the durability of the concrete is favorably improved, and in addition, the porous structure of the ceramsite can accelerate the loss of the fluidity of the sprayed concrete, thereby improving the formability of the sprayed concrete.
4) The sprayed concrete is extruded by spraying the sprayed concrete, and the sprayed concrete is sprayed layer by layer from bottom to top along the construction plane, so that the problem that the traditional sprayed concrete is easy to fall is solved. And the use of the components such as ferric chloride, microcrystalline cellulose and the like in the concrete layer is also beneficial to losing the fluidity rapidly after the sprayed concrete is sprayed, improving the formability of the sprayed concrete and reducing the rebound rate of the sprayed concrete.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
In the following examples, the modulus of the water glass is 2.5, and the particle size of the ceramsite is less than 3 mm.
Example 1
The sprayed concrete for the foundation pit side slope and the construction method thereof are characterized in that the sprayed concrete mainly comprises a grouting layer, a covering layer and a concrete layer, wherein the grouting layer comprises: 50 parts of water glass solution, 30 parts of garbage bottom slag powder, 10 parts of MgO, 20 parts of blast furnace ferronickel slag powder, 20 parts of magnesium chloride and 100 parts of water; the garbage bottom slag powder needs to be immersed in 0.05mol/L hydrochloric acid solution for 3 hours, the mass ratio of the garbage bottom slag powder to the solution is 1:10, then water glass solution is dropwise added into the garbage bottom slag powder solution while stirring, the stirring speed is 30 revolutions per minute, the mass ratio of the water glass solution to the garbage bottom slag powder is 1:80, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying; the cover layer includes: cotton-flax fiber and water glass solution; the concrete layer includes: 500 parts of cement clinker, 100 parts of lithium slag powder, 500 parts of ceramsite, 20 parts of ferric chloride, 10 parts of microcrystalline cellulose and 120 parts of water;
the method mainly comprises the following steps:
1) inserting barbed hollow nylon plastic expansion pipes into the construction plane every 30cm, wherein the length of each expansion pipe is 30 cm;
2) injecting a grouting layer material into the expansion pipe, and then standing for 1 h;
3) inserting a screw into the expansion pipe, wherein the distance of the screw exposed out of the construction plane is 5cm, and the screw is made of carbon fiber;
4) hanging a covering layer on the screw, wherein the cotton-flax fibers in the covering layer need to be sprayed with a water glass solution;
5) spraying sprayed concrete on the fabric layer by layer from bottom to top along the construction plane, extruding the concrete onto the fabric layer by using a sprayed concrete nozzle, and spraying the sprayed concrete to the same thickness as the height of the screw leaking out of the construction plane in the step 3)
6) And (7) spraying, moisturizing and maintaining for 7 d.
The ceramsite is shale ceramsite, which needs to be soaked in 0.01mol/L alpha-amino acid solution for 24 hours before use, and then dried until no obvious water stain exists on the surface of the ceramsite.
Example 2
The sprayed concrete for the foundation pit side slope and the construction method thereof are characterized in that the sprayed concrete mainly comprises a grouting layer, a covering layer and a concrete layer, wherein the grouting layer comprises: 20 parts of water glass solution, 50 parts of garbage bottom slag powder, 1 parts of MgO, 10 parts of magnesium chloride and 50 parts of water; the garbage bottom slag powder is required to be immersed in 0.2mol/L hydrochloric acid solution for 1 hour, the mass ratio of the garbage bottom slag powder to the solution is 1:20, then water glass solution is dropwise added into the garbage bottom slag powder solution while stirring, the stirring speed is 10 revolutions per minute, the mass ratio of the water glass solution to the garbage bottom slag powder is 1:30, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying; the cover layer includes: cotton-flax fiber and water glass solution; the concrete layer includes: 300 parts of cement clinker, 200 parts of lithium slag powder, 300 parts of ceramsite, 5 parts of ferric chloride, 20 parts of microcrystalline cellulose and 150 parts of water;
the method mainly comprises the following steps:
1) inserting barbed hollow nylon plastic expansion pipes into the construction plane every 10cm, wherein the length of each expansion pipe is 20 cm;
2) injecting a grouting layer material into the expansion pipe, and then standing for 3 hours;
3) inserting a screw into the expansion pipe, wherein the distance of the screw exposed out of the construction plane is 2cm, and the screw is made of glass fiber and the like;
4) suspending a covering layer on the screw, wherein the cotton-flax fiber in the covering layer needs to be impregnated with a water glass solution;
5) spraying sprayed concrete on the cotton-flax fibers layer by layer from bottom to top along the construction plane, extruding the concrete onto the cotton-flax fibers by using a sprayed concrete nozzle, and spraying the sprayed concrete to the same thickness as the height of the screw leaking out of the construction plane in the step 3)
6) And (5) spraying, moisturizing and maintaining for 3 d.
The ceramsite is shale ceramsite, which needs to be soaked in 0.05mol/L sucrose solution for 24 hours before use, and then dried until no obvious water stain exists on the surface of the ceramsite.
Example 3
The sprayed concrete for the foundation pit side slope and the construction method thereof are characterized in that the sprayed concrete mainly comprises a grouting layer, a covering layer and a concrete layer, wherein the grouting layer comprises: 30 parts of water glass solution, 40 parts of garbage bottom slag powder, 5 parts of MgO, 15 parts of blast furnace ferronickel slag powder, 15 parts of magnesium chloride and 80 parts of water; the garbage bottom slag powder needs to be immersed in 0.1mol/L hydrochloric acid solution for 2 hours, the mass ratio of the garbage bottom slag powder to the solution is 1:15, then water glass solution is dropwise added into the garbage bottom slag powder solution while stirring, the stirring speed is 20 revolutions per minute, the mass ratio of the water glass solution to the garbage bottom slag powder is 1:50, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying; the cover layer includes: cotton-flax fiber and water glass solution; the concrete layer includes: 400 parts of cement clinker, 150 parts of lithium slag powder, 400 parts of ceramsite, 15 parts of ferric chloride, 15 parts of microcrystalline cellulose and 140 parts of water;
the method mainly comprises the following steps:
1) inserting barbed hollow nylon plastic expansion pipes into the construction plane every 20cm, wherein the length of each expansion pipe is 25 cm;
2) injecting a grouting layer material into the expansion pipe, and then standing for 2 hours;
3) inserting a screw into the expansion pipe, wherein the distance of the screw exposed out of the construction plane is 4cm, and the screw is made of carbon fiber and materials;
4) hanging a covering layer on the screw, wherein the cotton-flax fibers in the covering layer need to be sprayed with a water glass solution;
5) spraying sprayed concrete on the fabric layer by layer from bottom to top along the construction plane, extruding the concrete onto the fabric layer by using a sprayed concrete nozzle, and spraying the sprayed concrete to the same thickness as the height of the screw leaking out of the construction plane in the step 3)
6) And (5) spraying, moisturizing and curing for 6 d.
The ceramsite is shale ceramsite, which needs to be soaked in 0.03mol/L magnesium chloride solution for 24 hours before use, and then dried until no obvious water stain exists on the surface of the ceramsite.
Example 4
The sprayed concrete for the foundation pit side slope and the construction method thereof are characterized in that the sprayed concrete mainly comprises a grouting layer, a covering layer and a concrete layer, wherein the grouting layer comprises: 30 parts of water glass solution, 50 parts of garbage bottom slag powder, 8 parts of MgO, 16 parts of magnesium chloride and 70 parts of water; the garbage bottom slag powder needs to be immersed in 0.1mol/L hydrochloric acid solution for 2 hours, the mass ratio of the garbage bottom slag powder to the solution is 1:10, then water glass solution is dropwise added into the garbage bottom slag powder solution while stirring, the stirring speed is 20 revolutions per minute, the mass ratio of the water glass solution to the garbage bottom slag powder is 1:50, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying; the cover layer includes: cotton-flax fiber and water glass solution; the concrete layer includes: 400 parts of cement clinker, 150 parts of lithium slag powder, 450 parts of ceramsite, 16 parts of ferric chloride, 15 parts of microcrystalline cellulose and 140 parts of water;
the method mainly comprises the following steps:
1) inserting barbed hollow nylon plastic expansion pipes into the construction plane every 15cm, wherein the length of each expansion pipe is 25 cm;
2) injecting a grouting layer material into the expansion pipe, and then standing for 1 h;
3) inserting a screw in the expansion pipe, wherein the distance of the screw exposed out of the construction plane is 3cm, and the screw is made of glass fiber;
4) hanging a covering layer on the screw, wherein the cotton-flax fibers in the covering layer need to be sprayed with a water glass solution;
5) spraying sprayed concrete on the fabric layer by layer from bottom to top along the construction plane, extruding the concrete onto the fabric layer by using a sprayed concrete nozzle, and spraying the sprayed concrete to the same thickness as the height of the screw leaking out of the construction plane in the step 3)
6) And (7) spraying, moisturizing and maintaining for 7 d.
The ceramsite is shale ceramsite, and the ceramsite is required to be soaked in 0.03mol/L alpha-amino acid, sucrose and magnesium chloride solution for 24 hours before use, wherein the alpha-amino acid: sucrose: and (3) drying the magnesium chloride solution until no obvious water stain exists on the surface of the ceramsite by airing the magnesium chloride solution at the molar ratio of 1:1: 1.
Comparative example 1
The components of a commercially available common ultra-high toughness spray concrete are as follows: 42.5 parts of cement 250 parts, fly ash 200 parts, medium sand 800 parts, pebble 1100 parts, accelerator 20 parts, polycarboxylate superplasticizer 5.5 parts and water 150 parts. The preparation method comprises the following steps: mixing and stirring the materials, spraying the mixture to a construction plane according to a conventional method, and maintaining for 28 d.
And (3) performance testing:
the concrete of comparative example and test examples 1 to 4 was cut into a size of 100mm × 100mm × 100mm, and mechanical properties thereof were measured according to "mechanical test method for general concrete" (GB/T50081-2002), and the test results are shown in Table 1:
TABLE 1
As can be seen from Table 1Although the compressive strength of the embodiment is not large compared with that of the comparative example, the flexural strength of the embodiment of the invention is almost 2 times that of the comparative example, the flexural strength of the sprayed concrete on a construction site is also a barrier for protecting a construction plane from impact damage and collapse damage, in addition, the rebound rate of the concrete obtained by the construction method of the invention is almost 0 and is far lower than that of the common sprayed concrete by nearly 20 percent, the material is greatly saved, and meanwhile, the concrete suffers from free falling of round ballsIn a body experiment, the invention has no obvious crack and obviously improves the collapse resistance.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (5)
1. A sprayed concrete for foundation pit side slope is characterized in that,
the sprayed concrete mainly comprises three parts of a grouting layer, a covering layer and a concrete layer,
the slip casting layer includes: 20-50 parts of water glass solution, 30-50 parts of garbage bottom slag powder, 1-10 parts of MgO, 10-20 parts of magnesium chloride and 50-100 parts of water;
before the garbage bottom slag powder is used, the garbage bottom slag powder needs to be immersed in 0.05-0.2 mol/L hydrochloric acid solution for 1-3 hours, the mass ratio of the garbage bottom slag powder to the solution is 1: 10-1: 20, then water glass solution is dripped into the garbage bottom slag powder solution while stirring, the stirring speed is 10-30 revolutions per minute, and then the garbage bottom slag powder is subjected to suction filtration, washing and drying;
the cover layer includes: cotton-flax fiber and water glass solution;
the concrete layer includes: 300-500 parts of cement clinker, 100-200 parts of lithium slag powder, 300-500 parts of ceramsite, 5-20 parts of ferric chloride, 10-20 parts of microcrystalline cellulose and 150 parts of water.
2. The construction method of the shotcrete for the foundation pit side slope according to claim 1, mainly comprising the steps of:
1) inserting barbed hollow nylon plastic expansion pipes into the construction plane every 10-30 cm, wherein the length of each expansion pipe is 20-30 cm;
2) injecting a grouting layer material into the expansion pipe, and standing for 1-3 hours;
3) inserting a screw into the expansion pipe, wherein the distance of the screw exposed out of the construction plane is 2-5 cm, and the screw is made of carbon fiber, glass fiber and the like;
4) suspending a covering layer on the screw, wherein the cotton-flax fiber in the covering layer needs to be soaked or sprayed with a water glass solution;
5) spraying sprayed concrete on the fabric layer by layer from bottom to top and along the construction plane, extruding the concrete onto the fabric layer by using a nozzle of a concrete spraying device, and spraying the sprayed concrete to the same thickness as the height of the screw leaking out of the construction plane in the step 3);
6) and (5) spraying, moisturizing and curing for 3-7 days.
3. The shotcrete for the foundation pit slope is characterized in that the mass ratio of the water glass solution to the garbage bottom slag powder is 1: 30-1: 80.
4. The shotcrete for foundation pit side slope according to claim 1, wherein the modulus of the water glass is between 1.5 and 2.5.
5. The shotcrete for the foundation pit slope according to claim 1, wherein the ceramsite is shale ceramsite, the particle size of which is less than 3mm, and the shotcrete is required to be soaked in one or more of 0.01-0.05 mol/L solutions of alpha-amino acid, sucrose and magnesium chloride for more than 24 hours before use, and then dried until no obvious water mark exists on the surface of the ceramsite.
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| CN113880547B (en) | 2022-07-01 |
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